烯基

A commercial and practical synthesis rout with-2-(3-acetoxy-l-me-thyl-l~propenyl)-5,5-dimethyl-l,3-dioxane as starting material by couple,oxidation, Ramberg-Backlund and deprotection is chosen and studied in this paper.

本文选择了以2-(3-氯-1-甲基-1-丙烯)-5，5-二甲基-1，3-二噁烷为原料，经偶连、氧化、Ramberg-Bcklund反应及脱保护基四步反应的合成路线，对该中间体进行合成研究。

Based on the experimental results,di-butyl-peroxide,di-cyclopentadiene and propyl nitrate are found to be sensitive to the change of heating temperature and heating time,and their thermal decomposed products can be detected easily.

实验表明，在343～473 K温度范围内，过氧化二叔丁基、双环戊二烯和硝酸丙酯对受热温度和受热时间的变化较为敏感，热分解现象明显，热分解产物易于检测。

While the basicity of the N-atom is stronger, more active second generation catalyst is indispensable and the temperature needs to be reached 150℃, and mixture of pyrrolidine and pyrrole was gained.

研究结果表明微波辐射条件下氮原子的碱性强弱对于二烯丙基胺发生关环复分解反应具有很大的影响：当底物的碱性比较强时，必须使用活性更高的第二代Grubbs催化剂，且温度需升至150℃反应才能顺利发生，得到光学纯吡咯啉和吡咯的混合物。

To an asymmetric synthesis of (1), we applied a type of Roush addition in the first step to introduce the C4 stereocenter, and then the chair substance -122 are readily transformed into the title compound -aphanorphine using the same route as to the racemic target molecular.

aphanorphine分子的不对称合成是在第一步通过对甲氧基苯乙醛（119）发生Roush反应引入手性，得到手性高烯丙醇-122，然后利用与合成外消旋目标分子相同的方法，光学纯化合物-122经一系列转化可得到光学纯中间体化合物139；化合物139发生分子内傅—克反应的过程中，由C4位手性立体特异地控制C1位手性的生成，从而解决-aphanorphine分子中的手性问题。

To observe effect of receptor ligand on subcelluar distribution of liposome was found that alprenolol liposomes was increased in mitochondria and sarcolemma,especially in nuclei(8 fold increased), as compared with blank liposome.

观察受体配基对脂质体在心肌亚细胞器中分布的影响，结果发现，烯丙洛尔掺入脂质体，使脂质体在细胞核、线粒体和肌膜的分布增加，尤其在细胞核增加最明显，较空白脂质体增多了8倍。

After incubation with farnesyl diphosphate, a sesquiterpene specific to Artemisia annua L. was successfully detected in the lytic suspension.

当裂解上清与法呢基焦磷酸保温后，成功地检测到青蒿特有的倍半萜烯。

The flow rate: 0.5 mL min^(-1), column tempera ture: 30 ℃, HPLC chromatogram: 230 nm. Contents of sinigrin in 20 kinds of rapeseed were determined.

结果表明，烯丙基硫苷HPLC分离检测的最佳条件为：流动相：甲醇：水0.005 molL^(-1 KCl=9：91；流速：0.5mLmin^(-1)；柱温：30℃；检测波长：230nm。

The results show that it only takes 8 min for the reaction, when the initiator is potassium persulfate/sodium thiosulfate which forms an oxidation-reduction initiator system; N,N-methylene diacrylamide is as cross-linker; neutralization degree is 70%, under the microwave power of 360 W.

结果表明，在360W的微波辐射功率下，采用过硫酸钾与硫代硫酸钠的氧化还原引发体系，N，N-亚甲基双丙烯酰胺为交联剂，接枝单体的中和度为70%时，只需8min就可以完成纤维素基高吸水树脂的接枝共聚合成。

In this paper, the carbonylation has been studied of olefins in different solvent systems.

本文研究了烯烃在不同溶剂体系中进行羰基化反应的规律。

Liquid-phase epoxidation of allyl chloride with hydrogen peroxide was carried out over Ti-MWW, a novel titanosilicate with the MWW structure, to synthesize epichiorohydrin selectively and effectively. Ti-MWW proved to be superior to the conventional TS-1 catalyst in both catalytic activity and product selectivity. Ti-MWW prefers aprotic solvents of acetone and acetonitrile, both of which can restrain the solvolysis of epichiorohydrin, whereas TS-1 favors a protic solvent of methanol.

研究了具有MWW结构的新一代钛硅分子筛Ti-MWW催化剂对烯丙基氯液相环氧化高效合成环氧氯丙烷的催化性能结果表明，Ti-MWW的催化活性以及产物选择性均优于传统的钛硅分子筛TS-1，对于Ti-MWW，合适的溶剂为非质子性溶剂丙酮和乙腈，在该溶剂中环氧化物不易发生溶剂化开环反应；而对于TS-1，合适的溶剂是质子性溶剂甲醇，但甲醇可导致醇醚副产物的生成。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。